fix

Assets/YGOSharp/BanlistManager.cs

@@ -46,10 +46,14 @@ namespace YGOSharp
                 }
             }
             if(!test) {
+                if (Banlists == null) {
+                    Banlists = new_list;
+                } else { 
                     foreach (var item in new_list) {
                         Banlists.Add(item);
                     }
                 }
+            }
             return (success && new_list.Count > 1);
         }